As glamorous as it may sound to jet-set across the country, schmooze with clients, and live off room service, just about every business traveler would beg to differ.

There are flights to catch, car rentals to book, endless airport security lines to navigate, and, of course, the hassle of keeping tabs on your paper trail along the way (because how else will you get reimbursed?).

And we haven't even mentioned the whole living-out-of-a-suitcase factor. Since carry-on bags give business travelers the ultimate mobility factor, we asked a few frequent fliers to help us put together a list of items they would never leave home without.